pdc_instr(9)

💅 pdc_instr — a kernel API manual moment 🎀

okay bestie, welcome to pdc_instr(9), a real page from the Kernel API Manual. it's short, it's sweet, it's giving "one job and she does it" energy. let's get into it ✨

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✨ NAME ✨

pdc_instr — no cap, this one literally gets you the instruction that invokes PDCE_CHECK inside the HPMC handler. that's the whole gig. 🫶

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🌸 SYNOPSIS 🌸

int pdc_instr (unsigned int *instr );

look at her. one argument, one return, zero drama. 👑

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🦋 ARGUMENTS 🦋

• instr — a pointer to the variable that's gonna receive the instruction opcode. so like, you hand her an empty cup and she fills it with opcode. tea. ☕💖

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🎀 DESCRIPTION 🎀

the return value is PDC_OK (0) in case the call succeeded. that's it. that's the description. she said "keep it brief, keep it iconic." 💅

ngl there is not a single extra word here, so there is not a single extra word from me either. the vibe check is: succeeds → 0 → PDC_OK. periodt. ⭐

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🌈 SEE ALSO 🌈

the whole friend group showed up, and honestly? obsessed. the kernel file ./arch/parisc/kernel/firmware.c is the source of truth, and these are the besties:

• f_extend(9)
• convert_to_wide(9)
• set_firmware_width(9)
• pdc_emergency_unlock(9)
• pdc_add_valid(9)
• pdc_chassis_info(9)
• pdc_pat_chassis_send_log(9)
• pdc_chassis_disp(9)
• __pdc_cpu_rendezvous(9)
• pdc_cpu_rendezvous_lock(9)
• pdc_cpu_rendezvous_unlock(9)
• pdc_pat_get_PDC_entrypoint(9)
• pdc_chassis_warn(9)
• pdc_coproc_cfg(9)
• pdc_iodc_read(9)
• pdc_system_map_find_mods(9)
• pdc_system_map_find_addrs(9)
• pdc_model_info(9)
• pdc_model_sysmodel(9)
• pdc_model_versions(9)
• pdc_model_cpuid(9)
• pdc_model_capabilities(9)
• pdc_model_platform_info(9)
• pdc_cache_info(9)
• pdc_spaceid_bits(9)
• pdc_btlb_info(9)
• pdc_mem_map_hpa(9)
• pdc_lan_station_id(9)
• pdc_stable_read(9)
• pdc_stable_write(9)
• pdc_stable_get_size(9)
• pdc_stable_verify_contents(9)
• pdc_stable_initialize(9)
• pdc_get_initiator(9)
• pdc_pci_irt_size(9)
• pdc_pci_irt(9)
• pdc_pci_config_read(9)
• pdc_pci_config_write(9)
• pdc_tod_read(9)
• pdc_pim_toc11(9)
• pdc_pim_toc20(9)
• pdc_tod_set(9)
• pdc_iodc_print(9)
• pdc_iodc_getc(9)
• pdc_pat_cell_get_number(9)
• pdc_pat_cell_module(9)
• pdc_pat_cell_info(9)
• pdc_pat_cpu_get_number(9)
• pdc_pat_get_irt_size(9)
• pdc_pat_get_irt(9)
• pdc_pat_pd_get_addr_map(9)
• pdc_pat_pd_get_pdc_revisions(9)
• pdc_pat_pd_get_platform_counter(9)
• pdc_pat_io_pci_cfg_read(9)
• pdc_pat_io_pci_cfg_write(9)
• pdc_pat_mem_pdt_info(9)
• pdc_pat_mem_pdt_cell_info(9)
• pdc_pat_mem_read_cell_pdt(9)
• pdc_pat_mem_read_pd_pdt(9)
• pdc_pat_mem_get_dimm_phys_location(9)

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and that's the whole page, bestie, we ate and left no crumbs 🍓🧚

cute little sign-off: this one lives under ./arch/parisc/kernel, dated October 2026, and it's page pdc_instr(9) of the Kernel API Manual — go forth and check those HPMC vibes 💜🔥